http://bugs.winehq.org/show_bug.cgi?id=32058
--- Comment #4 from x.egam.wodahs.x@gmail.com 2012-10-26 16:46:29 CDT --- In 1.5.15, the window is visible, and has a transparent background (like it does on Windows), but it locks up. I don't see the login form (freezes before it loads) and even clicking the X inside the window on the top-right has no effect.
I don't get an error message in GW2 as it seems to just hang, but I can attach the output from wine (I can't say that I understand what it says).
Interestingly though, I just realized that if I leave it long enough (several minutes), the login form finally appears, but it is impossible (or very difficult) to login because it again appears frozen. Perhaps it is moving along, just incredibly slow? In 1.5.14, it only takes me about 3 or 4 seconds from the time I launch the game until I can start typing my login, and the input is smooth.